In this Wednesday, March 31, 2004 file photo, workers package beef head meat at the Creekstone Farm Premium Beef meatpacking plant in Arkansas City, K

In this Wednesday, March 31, 2004 file photo, workers package beef head meat at the Creekstone Farm Premium Beef meatpacking plant in Arkansas City, Kan. The Bush administration on Friday, May 9, 2008, urged a federal appeals court to stop meatpackers from testing all their animals for mad cow disease, but a skeptical judge questioned whether the government has that authority. (AP Photo/Charlie Riedel, File)

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